Heat-control device for ovens



Sept; 11, 1928. 1,684,205

A. G. SHERMAN ET AL HEAT CONTROL DEVICE FOR OVENS Filed May 19, 1926 '5 s t t 1 imam?" l1:

. I I N V EN TOR5 iven (6. iz'ermwn Sept H, 1928. 1,684,2Q5

A. G. SHERMAN ET AL I HEAT CONTROL DEVICE FOR OVENS Filed May 19, 1926 3 Sheets-Sheet 2 1-; 1 1 5. uunamgf VENTORS I 620796 mzih By 660792 1/. .Famig 525/1 6 erman Sept, 11, 1928. mum

A. G. SHERMAN ET AL HEAT CONTROL DEVICE FOR OVENS Filed May 19, 1926 5 sh t -sh t '3 INV EN TOR. 14/1 07 61 ,71erman earyef5mazb 'earye 79. @7719 A A TORNEY.

Patented (Sept. 1 11, 1928.

'5 the supply'of fuel to an oven and a novel outlet conduits leading to and from the valve' UNITED srAr Es #PATE jNT OFFICE.

ALVIN e. SHERMAN, GEORGE SMITH, AND GEORGE n. mime, or nnrnorr, AND CYRIEL A. noose, or enossn roINTE FARMS, MICHIGAN, ASSIGNORS ro THE DETROIT GAIN.

Application filed May 19,

This invention relates to a heat control device. for ovens: It has to do particularly with the provision of a novel, compact and extremely simple thermostat for controlling manner of arranging the thermostat in combination with the-oven. It is the object of the I present invention to provide a thermostatica ly operated valve VAPOR STOVE CO.', 01 DETROIT, MICHIGAN, A CORPORATION OF MICHI- nmr-conrnon nnvrcn FOR ovens.

192s. Serial Ito. 110,085. showing the novel manner of adjusting the expansible member to initially set the valve.

F ig. 5 is a sectional view taken on line 5 -5 of Fig. 4 and showing the inlet and structure.

F1 6 is-a fragmentary front elevation of the structure shown in Fig. 4; and showing the indicating dial and handle andpointer structure for controlling the supply of fuel member for adjusting the expansible memto the burners and novel means for directly adjusting the valve controlling parts with a minimum amount of mechanical motion, and with a minimum amount of wear on such various parts. A further object otthe present invention has to do with the location of the thermostatically controlled valve and the various connected parts within the oven so as to present an oven and stove,

structure of pleasing a pearance and with a minimum number 0 exposed parts. A still further object of the invention, has to do with a novel manner of locating the heat control structure within the oven, whereby on the outside of the oven; and a novel arrangement of said parts in comblnatlon with the oven whereby the various parts of necting of the various the valve structure are readily accessible for cleaning from the outside of the stove without disassembly of any 'of the arts and without changing of the dial setting.

In the drawings:

Fig. 1 is a perspective view of a gas stove provided with our heat control device and showing the pleasing outward appearance of the stove.

Fig. 2 is a front elevation in vertical section taken on a plane just forward of the heat control .device in Fi 1 and showing the preferred manner of ocating the heat control device within the oven and theconpipes ,to the' oven supplypipe.

Fig. 3 is a diagrammatical plan view of the structure shown in Fig. 1 and showing the heat control'device and piping connections therefor in solid lines and the remain.

'at the same time preventing rotation thereof.

Heretofore in the use of heat control devices for ovens, it has been the custom to mount the thermostatically controlled valve and various connecting parts on the outa .side of the oven. TlllS outside mounting only the adjusting and indicating parts are of the heat control structure, together with the various connectinggas pipes and parts, has heretofore presented a very cumbersome and unsightlystove unit, as well as taking up a large amount of space at the f side of the oven.

The present invention overcomes such cumbersome locating of the heat control structure and connecting parts by locating the heat control structure as a unit on the inside of theoven in oombinationwith the novel manner of securing such structure to the oven.

Referring to the drawings, which disclose one embodiment of the invention, the thermostatically controlled valve is shown as being mounted in. an integral housing 1. lhis housing is best shown in Figs. & and 5 and preferably comprises an integral casting with a chamber 2 therein. This chamher 2 is providedwith an annular valve seat 3 and such chamber is connected by means of a suitable inlet port 3' and outlet port 4:.

The rear of the housing 1 is provided with a suitable aperture 5 adapted to receive and guide the stem of a valve 6. This valve is designed to seat against the annular seat 3 and is normally held in closed position by means of a suitable coil spring 7. 'lfhis coil which may be'made of copper, brass, or any 7 other similar material having a high coeflicient of expansion. vThis tube 10 is designed to receive a non-expansible member- 11 of carbon, or similar material, one end of said member 11 abutting against one end of tube 10, and the other end abutting against, or positioned adjacent the ,endof the valve stem 6.- It will be obvious that if I the expansible member 10 is moved inwardly 19, and is provided with a suitable rectangular aperture 20, and flanges 21 for receiv- .to receive suitable cap screw 24, as shown in Fig. 6, for securing the housing unit 1 to towards the valve that the valve will be moved from its seat against the pressure of the spring7 and that if such expansible member 10 is heated to a suflicient degree,

' the expansion thereof permits movement of the member 11 to permit gradual closing of the valve.

One of the important features of our invention is the manner of operating and adjusting this expansible member 10. housing 1 is provided with asuitable lug 12 for pivotally supporting a suitable lever 13.

. The upper end of this lever 13 is bifurcated and is designed to embrace the inner end of the tube and to abut against a flange 14 of such tube. Suitable pins 15 are positioned on each side of tube 10 and-slightly above the center thereof and are designed to prevent rotation of the tube about its,longitudinal axis. Such prevention of rotation of the tube will obviously prevent any grinding .or wearing action between the non-expansible carbon memberll and theexpansible tube. The lower end of the lever 13 is designed to contact with a suitable screw 16 which extends through and is threaded in the bottom part of the housin 1, and which screw also ing, where y when the housing is assembled in the oven a part of the screw will project exteriorly of the oven. A suitable pointer The - of a suitable conduit 30, and this inlet pipe protrudes forwardly of such hous-- 17 and handle 18 are mounted on the outer end of the movement of the lever 13, and

i rectilinear movement of the tube 10 and the through pointer 17 toengage an the handle and pointer upon the screw rod valve 6. The handle 18 is preferably threaded in the pointer 17,-and-preferabl extends position 16. By this arrangement the handle and POIII tBI' may be readily removed or they may be readily adjusted to initially adjust or permitchange of the dial setting in accord ance Wlllh, the expansible and non-expansible members of the valve element. v

The outside oven body may be designated the shell or lining 19 of the oven. A suitable shield, or cover 25 is designed to be secured to the exterior of the oven and so shaped as to cover the rectangular opening 20-and to also extend downwardly around the screwshaft 16. This shield is slotted as at 26 and the lower ,end of such slot is designed toreceive a suitable set screw 27 for securing the shield in place, as shown in Fig. 6. The set screw 27 is adapted to screw into the boss 22 as best illustrated in Fig. 7. This set screw serves two purposes, in that, it serves as a meansfor stopping the pointer in its two extreme positions, and also servesas' be obvious that the handle 18 and pointer 17 a being once set on the screw 16, that the valve structure of-the housing may be cleaned without disturbing the setting of the ther- T mostat.

B securing the thermostat to the inside of the oven by meansof the screws 24 and set screw 27 it is possible to conceal the piping leading to and "from the thermostat housing. As best shown in Figs. 2 and 3 the inlet and outlet pipes 28 and 29 extend directly downwardly from the housing 1 within the oven. The inlet pipe 28 is suit-' ably connected to the. oven valve by means may be provided at its base with a suitable pilot light burner 31, as shown in Fig. 2. The outlet pipe 29 from ,the thermostat which leads to the oven burners 32 preferably extends to the exterior of the oven casing and beneath the hot late of the range so that it is obscured rom general view. "It will be understood that such connecting pipe between the pipe 29 and the mixer for the burners may be itioned on the inside of the oven if desired, but the arrangement shown in Fig. 3 is the preferred form.

In operation, the various pipe connections having been installed as illustrated, it will be obvious that the 'set screw 16 may be turned to contact with the pivoted lever 13. The pointer 17 may then be inserted upon the end of thescrew shaft 16 and the handle members 10 and 11 and the position of the valve member 6. It will be understood that a suitable indicating dial may be positioned or formed on the exterior of the shield 25, as illustrated ,in Fig. 6 and the handle pointer having been set to the desired position, the handle may then be turned ,so that the pointer 17 is positioned at the temperature to which it is desired that the oven be heated up to. This turning of the handle 18 will open the valve 6 and admit gas to .the oven burners, and as the oven gradually approaches the temperature corresponding to the setting of the dial the tube 10 will expand and lengthen to such a degree that the valve 6 will gradually tend to close and thus restrict, or stop the flow of gas to the burner in order to maintain the temperature to which the pointer is set.

It will ,thus be seen that we have provided a novel heat control unit which may be quickly and easily placed on the inside of the oven and completely enclosed from view with the exception of the handle and dial for controlling the operation of the heat control unit. It will further be obvious that we have. provided a novel arrangement of thermostatically. controlled valve and means for operating and adiusting the same whereby the setting may be quickly and easily obtained or. corrected, and which heat control unit is so arranged in combination with the oven that the parts of the thermostatically operated valve may be quickly and easily obtained or corrected, and which heat control unit is so arranged'in combination with the oven that the parts of the thermostatically operated valve may be quickly and easily cleaned from the exteriorof the oven without the dismantling of any of the parts.

What we claim is: 1. A heat control device for ovens or similar structures, comprising in combination a heat control unit secured to the interior of the oven, the oven having an opening adjacent said heat control unit and a shield on the exterior of the oven readily removable to permit access to said heat control unit.

2. A heat control device for ovens or similar structures, comprising in combination a heat control unit adapted to be. positioned on the interior of the oven, means insertable from the exterior of the oven for securing the unit to the oven wall and readily removable means for covering said securing means and serving control unit. 3. A heat controlling device for ovens an the like, comprising a housin positioned on the interior of the oven wai temperature controlling means within said housing, an exas an indicator for said heatv pansible and a non-expansible member, and means pivotally mounted von said housing for moving one of said members only to actuate said temperature controlling means.

4.. A heat control device for ovens or similar structures comprising a housing positioned within the oven, heat responsive means carried by the housing, a shaft carried byand projecting from the housing, a member pivotally carried by the housing and connectingthe shaft and heat responsive means for positioning said heat responsive means and an operating and indicating means both adjustably secured to said shaft whereby the setting of the heat control device may be readily corrected.

5. A heat control device for ovens or the like, comprising a heat control unit mounted on the interior of the oven, a shaft for controlling the operation'of said heat controlling device projecting from said oven, indicating means secured tosaid shaft, and an operating handle for adjustably and removably securing said indicating means to said shaft and operating the shaft through the indicating means.

6. A heat controlling device for controlling the temperature within an enclosure, comprising a housing secured to an interior Wall of said enclosure, a chamber in said said device and means movable to permit cleaning or inspection of said device from the outside of the oven, without changing the setting of said regulating means.

8. A heat control device for ovens or the like, comprising-a housing mounted on the oven wall within the oven, temperature control means in the housing, heat responsive elements supported by this housing and pros jecting therefrom 'inwardly of the oven and away from the said oven wall, means carried by this housing eccentric of the temper-.

ature control means and projecting through the oven wall for adjusting the heat responslve elements.

9. 'Aheat control device for ovens or the like, comprisinga housing mounted on the oven wall within the oven, temperature control means in the housing, heat responsive elements supported by this housing substantially concentrically with the temperature control means and projecting inwardly of the oven away from the said oven wall, and means carried by the housing eccentric of both the temperature control means and heat responsive elements, said last named means projecting through the oven wall and operable from the outside of the oven to adjust the heat responsive elements.

10. A heat control device for ovens or the like, comprising a housing mounted on the oven wall within the oven, temperature control means in the housing, heat responsive elements supported by this housing substantially concentrically with the temperature control means and projecting inwardly of the oven away from the said'oven wall, a shaft carried by thisihousing eccentrically of both the temperature control means and the heat responsive elements, said shaft projecting through the oven wall, means operatively connecting the inner end of the shaft wit-hat least one of the heatresponsive elements, and means on the outside end of the shaft operable to adjust the heat responsive elements.

11. heat control device for ovens and the like, comprising a housing mounted as a unit inside the oven wall, a temperature controlling valve in the housing, athermostatic element mounted on the housing in alignment with the valve, gas pipes positioned Within said oven wall and extending to and from said housing, and means carried by said housing eccentric of the axis of the valve member, and projecting through the 3 oven wall to permit adjustment of the thermostatic element. 7

12. A heat control device for ovens and the like,v comprising in combination a housin 7 including a temperature controlhng unit an thermostatic element mounted as a unit-in the interior of the oven, gas pipes positioned within the oven and extending to and from said housing, a shaft extending through said housing one end projecting outwardly through the oven wall-and the other end extending inwardly past the housing, a member secured'to the housing and directly consaid shield.

In testimony whereof we have aflixed our signatures.

ALVIN G. SHERMAN. GEORGE SMITH.

GEORGE H. RAMIG. CYRIEL A. ROOSE.

cooperating with, 

